Nanana's Buried Treasure

Nanana's Buried Treasure

Nanana's Buried Treasure is a light novel series that received an anime adaptation in 2014.

Jyugo Yama is a boy who was disowned by his father and forced to transfer to a high school on an artificial island. He begins to live by himself, only to discover his room is haunted by a ghost named Nanana Ryugajou, who can't rest in peace till her killer is found.